<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>

    <style>
      body {
        height: 2000px;
      }
    </style>
  </head>
  <body>
    <script>
        let timer = null
        window.onscroll = function () {
            
            clearTimeout(timer)

            timer = setTimeout(() => {
                console.log('.........')
            }, 100);
        }
    </script>
  </body>
</html>
